81811919

素因数分解:

$7^2\times {\mathrm{61}}^1\times {\mathrm{101}}^1\times {\mathrm{271}}^1$

素因数の和:447

約数の個数: 24

約数和(自身を含む): 98047296

約数和(自身を除く): 16235377

約数列:

[1, 7, 49, 61, 101, 271, 427, 707, 1897, 2989, 4949, 6161, 13279, 16531, 27371, 43127, 115717, 191597, 301889, 810019, 1341179, 1669631, 11687417, 81811919]

約数ペア:

[(1, 81811919), (7, 11687417), (49, 1669631), (61, 1341179), (101, 810019), (271, 301889), (427, 191597), (707, 115717), (1897, 43127), (2989, 27371), (4949, 16531), (6161, 13279)]